DTC P0707: Tr Switch Circuit Shorted Or DTC P0708: Tr Switch Circuit Open: Description
WARNING: This page is about a different car, the 2002 Mazda 626 and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0707 or P0708 is set when PCM detects (after 2 drive cycles) an open or short in TR switch circuit.